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-rw-r--r--src/grt/grt-vpi.ads2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/grt/grt-vpi.ads b/src/grt/grt-vpi.ads
index 88dc913dc..42d762518 100644
--- a/src/grt/grt-vpi.ads
+++ b/src/grt/grt-vpi.ads
@@ -333,6 +333,8 @@ private
Cb_Prev, Cb_Next : vpiHandle;
Cb_Wire : Grt.Vcd.Verilog_Wire_Info;
Cb_Handle : Callbacks.Callback_Handle;
+ -- Number of reference to the handler by the simulation kernel.
+ Cb_Refcnt : Natural;
when others =>
Ref : VhpiHandleT;
end case;